Hi, Daniel. I use the following settings:
net.ipv4.tcp_syncookies = 0 net.ipv4.tcp_moderate_rcvbuf=0 net.ipv4.tcp_low_latency = 1 Message "failed connection attempts", can be ignored, it is not just a server error, but the client. For example: A client lost its connection to the server. 2014-03-26 18:29 GMT+04:00 Dan Van Der Ster <daniel.vanders...@cern.ch>: > Hi all, > I recently noticed our OSD servers have a very large number of TCP failed > connection attempts. This is typical (output from netstat -s): > > 50329019 active connections openings > 15218590 passive connection openings > 44167087 failed connection attempts > > I’m not a TCP expert at all — but this doesn’t look good. Do others have > similar numbers? Does anyone know if some ipv4 sysctl tuning can clear this > up? > Cheers, Dan > > > -- Dan van der Ster || Data & Storage Services || CERN IT Department -- > > _______________________________________________ > ceph-users mailing list > ceph-users@lists.ceph.com > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com > > -- С уважением, Фасихов Ирек Нургаязович Моб.: +79229045757
_______________________________________________ ceph-users mailing list ceph-users@lists.ceph.com http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
